PENGARUH PENAMBAHAN SUPERPLASTICIZER TERHADAP NILAI MODULUS ELASTISITAS PADA BETON GEOPOLIMER
Article Sidebar
Main Article Content
Abstract
Geopolymer concrete is a type of environment friendly concrete because in term of its manufacture, cement can be replaced by waste materials such as fly ash. Based on several previous studies, the modulus elasticity of geopolymer concrete is still below the modulus elasticity of cement concrete is 4700 . To increase the value of modulus elasticity in geopolymer concrete can be obtained by increasing the density of the concrete. In this research, an experimental study was carried out by adding superplasticizer which is expected to increase the density and modulus elasticity in geopolymer concrete. Experimental studies were carried out by testing the compressive strength and modulus elasticity on geopolymer concrete specimens. The specimens were made in form of a cylinder 15 cm with 30 cm height having design compressive strength of 30 to 55 MPa. To obtain design compressive strength, NaOH was used with molarities of 8M, 10M, 14M, and 16M with the concrete being steam curing for 4 hours at 70°C, 80°C, and 90°C. The results showed that the superplasticizer can increase the compressive strength and modulus elasticity in geopolymer concrete. The modulus elasticity of geopolymer concrete is 3500 or 75% of the modulus elasticity in cement concrete.
Abstrak
Beton geopolimer merupakan salah satu jenis beton ramah lingkungan, karena dalam pembuatannya material semen dapat digantikan dengan material limbah seperti abu terbang. Berdasarkan beberapa penelitian sebelumnya, nilai modulus elastisitas beton geopolimer masih di bawah standar modulus elastisitas beton semen yaitu 4700 . Untuk meningkatkan nilai modulus elastisitas pada beton geopolimer dapat dilakukan dengan meningkatkan kepadatan betonnya. Pada penelitian ini dilakukan studi eksperimental dengan menambahkan superplasticizer yang diharapkan dapat meningkat kepadatan dan modulus elastisitas pada beton geopolimer. Studi eksperimental yang dilakukan dengan menguji kuat tekan dan modulus elastisitas pada benda uji beton geopolimer yang sudah dibuat. Benda uji yang dibuat berbentuk silinder 15 cm dan tinggi 30 cm dengan mutu rencana 30 sampai 55 MPa. Untuk mendapatkan mutu rencana, NaOH yang digunakan dengan molaritas 8M, 10M, 14M, dan 16M dengan beton dirawat uap selama 4 jam pada suhu 70°C, 80°C dan 90°C. Hasil penelitian menunjukkan bahwa superplasticizer dapat meningkatkan nilai kuat tekan dan modulus elastisitas pada beton geopolimer. Nilai modulus elastisitas beton geopolimer yang didapatkan sebesar 3500 atau sebesar 75% terhadap modulus elastisitas beton semen.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
This work is licensed under Jurnal Mitra Teknik Sipil (JMTS) Creative Commons Attribution-ShareAlike 4.0 International License.References
American Society for Testing and Material. (2002). C469: Standard Test Method For Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression. ASTM Standard Book, 04, 1–5. http://portales.puj.edu.co/wjfajardo/mecanica de solidos/laboratorios/astm/C469.pdf
Badan Standardisasi Nasional. (2011). SNI 1974-2011 Cara Uji Kuat Tekan Beton dengan Benda Uji Silinder. Badan Standardisasi Nasional Indonesia, 20. www.bsn.go.id
Badan Standardisasi Nasional. (2014). Spesifikasi abu terbang batubara dan pozolan alam mentah atau yang telah dikalsinasi untuk digunakan dalam beton Standard specification for coal fly ash and raw or calcined natural pozolan for use in concrete. Badan Standardisasi Nasional, 16.
Badan Standardisasi Nasional. (2019). Persyaratan Beton Struktural untuk Bangunan Gedung. SNI 2847-2019, 8, 720.
Bellum, R. R., Muniraj, K., Rama, S., & Madduru, C. (2019). Annales de Chimie - Science des Matériaux Empirical Relationships on Mechanical Properties of Class-F Fly Ash and GGBS Based Geopolymer Concrete. Annales de Chimie - Science Des Matériaux, 43(3), 189–197.
Bhavsar, J. K., & Panchal, V. (2022). Ceramic Waste Powder as a Partial Substitute of Fly Ash for Geopolymer Ceramic Waste Powder as a Partial Substitute of Fly Ash for Geopolymer Concrete Cured at Ambient Temperature. December. https://doi.org/10.28991/CEJ-2022-08-07-05
Chouksey, A., Verma, M., Dev, N., Rahman, I., & Upreti, K. (2022). An investigation on the effect of curing conditions on the mechanical and microstructural properties of the geopolymer concrete. Materials Research Express, 9(5), 55003. https://doi.org/10.1088/2053-1591/ac6be0
Elisabeth, S., Lukar, C., Pandaleke, R., & Wallah, S. (2020). Pengujian Modulus Elastisitas Pada Beton Dengan Menggunakan Tras Sebagai Subtitusi Parsial Agregat Halus. Jurnal Sipil Statik, 8(1), 33–38.
Hardjasaputra, H., Cornelia, M., Gunawan, Y., Surjaputra, I. V., Lie, H. A., Rachmansyah, & Pranata Ng, G. (2019). Study of mechanical properties of fly ash-based geopolymer concrete. IOP Conference Series: Materials Science and Engineering, 615(1). https://doi.org/10.1088/1757-899X/615/1/012009
Indrayani, P., Sulianti, I., Flaviana Tilik, L., Suhirkam, D., Prawira Wardana, M., & Milawati, I. (2022). Pengaruh Penambahan Serat Kawat Bendrat Terhadap Kuat Lentur Beton Geopolimer. Terapan Bidang Rekayasa Sipil, 10(1), 69–76. http://jurnal.unismabekasi.ac.id/index.php/bentang
Khalaf, A. A., & Kopecskó, K. (2022). Modelling of Modulus of Elasticity of Low-Calcium-Based Geopolymer Concrete Using Regression Analysis. Advances in Materials Science and Engineering, 2022. https://doi.org/10.1155/2022/4528264
Lisantono, A., & Jenifer, W. Y. (2020). Pengaruh Penambahan Superplasticizer Terhadap Sifat Mekanik Beton Memadat Mandiri Dengan Serat Serabut Kelapa. Konferensi Nasional Teknik Sipil 12, 5(3), 248–253.
Loya, E. I. D. (2011). Development of approximating functions to model and predict the properties of fresh and hardened fly ash-based geopolymer concrete. Dissertations, ProQuest Dissertations Publishing, Ann Arbor, Michigan, 1–126.
Putra, E. P., Herbudiman, B., & Irawan, R. R. (2016). Efek Kadar Polycarboxylate Ether (PCE) terhadap Sifat Mekanik Beton Geopolimer Berbasis Fly Ash. Jurnal Online Institut Teknologi Nasional, 2(4), 136–147.
Putra, I., Hajani, C. N., Fauzi, A., & Mahyar, H. (2022). Penggunaan Fly Ash Pangkalan Susu Terhadap Ikatan Mikrostruktur Dan Karakterisitik Pasta Geopolimer. Jurnal Bissotek, ISSN 1412-3800 81, 12(2), 81–89.
Rachmansyah, Adventi Auditia, B., & Hardjasaputra, H. (2021). Pengaruh Jumlah Pasta Terhadap Kuat Tekan Beton. Jurnal Teknik Pembangunan Sipil, 1–6.
Rajamane, N. P., & Jeyalakshmi, R. (2014). Quantities Of Sodium Hydroxide Solids and Water to Prepare Sodium Hydroxide Solution of Given Molarity for Geopolymer Concrete Mixes. ICI Technical Paper, 4–9.
Triwullan, Ekaputri, J. J., & Priyanka, N. F. (2017). The Effect of Temperature Curing on Geopolymer Concrete. MATEC Web of Conferences, 97, 0–5. https://doi.org/10.1051/matecconf/20179701005
Umiati, S., Thamrin, R., & Harti, N. (2019). Pengaruh Penambahan Superplasticizier Terhadap Kuat Tekan Beton. In ACE Conference.
Waqas, R. M., Butt, F., Zhu, X., Jiang, T., & Tufail, R. F. (2021). A Comprehensive Study on the Factors Affecting the Workability and Mechanical Properties of Ambient Cured Fly Ash and Slag Based Geopolymer applied sciences A Comprehensive Study on the Factors Affecting the Workability and Mechanical Properties of Ambien. Applied Sciences, September, 1–30. https://doi.org/10.3390/app11188722